physics_body_2d.h

/*************************************************************************/
/*  physics_body_2d.h                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#ifndef PHYSICS_BODY_2D_H
#define PHYSICS_BODY_2D_H

#include "scene/2d/collision_object_2d.h"
#include "servers/physics_2d_server.h"
#include "vset.h"


class PhysicsBody2D : public CollisionObject2D {

    OBJ_TYPE(PhysicsBody2D,CollisionObject2D);

    uint32_t mask;
    uint32_t collision_mask;
    Vector2 one_way_collision_direction;
    float one_way_collision_max_depth;


    void _set_layers(uint32_t p_mask);
    uint32_t _get_layers() const;

protected:

    void _notification(int p_what);
    PhysicsBody2D(Physics2DServer::BodyMode p_mode);

    static void _bind_methods();
public:

    void set_layer_mask(uint32_t p_mask);
    uint32_t get_layer_mask() const;

    void set_collision_mask(uint32_t p_mask);
    uint32_t get_collision_mask() const;


    void set_collision_mask_bit(int p_bit, bool p_value);
    bool get_collision_mask_bit(int p_bit) const;

    void set_layer_mask_bit(int p_bit, bool p_value);
    bool get_layer_mask_bit(int p_bit) const;

    void add_collision_exception_with(Node* p_node); //must be physicsbody
    void remove_collision_exception_with(Node* p_node);

    void set_one_way_collision_direction(const Vector2& p_dir);
    Vector2 get_one_way_collision_direction() const;

    void set_one_way_collision_max_depth(float p_dir);
    float get_one_way_collision_max_depth() const;

    PhysicsBody2D();

};

class StaticBody2D : public PhysicsBody2D {

    OBJ_TYPE(StaticBody2D,PhysicsBody2D);

    Vector2 constant_linear_velocity;
    real_t constant_angular_velocity;

    real_t bounce;
    real_t friction;


protected:

    static void _bind_methods();

public:

    void set_friction(real_t p_friction);
    real_t get_friction() const;

    void set_bounce(real_t p_bounce);
    real_t get_bounce() const;


    void set_constant_linear_velocity(const Vector2& p_vel);
    void set_constant_angular_velocity(real_t p_vel);

    Vector2 get_constant_linear_velocity() const;
    real_t get_constant_angular_velocity() const;

    StaticBody2D();
    ~StaticBody2D();

};

class RigidBody2D : public PhysicsBody2D {

    OBJ_TYPE(RigidBody2D,PhysicsBody2D);
public:

    enum Mode {
        MODE_RIGID,
        MODE_STATIC,
        MODE_CHARACTER,
        MODE_KINEMATIC,
    };

    enum CCDMode {
        CCD_MODE_DISABLED,
        CCD_MODE_CAST_RAY,
        CCD_MODE_CAST_SHAPE,
    };

private:

    bool can_sleep;
    Physics2DDirectBodyState *state;
    Mode mode;

    real_t bounce;
    real_t mass;
    real_t friction;
    real_t gravity_scale;
    real_t linear_damp;
    real_t angular_damp;

    Vector2 linear_velocity;
    real_t angular_velocity;
    bool sleeping;


    int max_contacts_reported;

    bool custom_integrator;

    CCDMode ccd_mode;


    struct ShapePair {

        int body_shape;
        int local_shape;
        bool tagged;
        bool operator<(const ShapePair& p_sp) const {
            if (body_shape==p_sp.body_shape)
                return local_shape < p_sp.local_shape;
            else
                return body_shape < p_sp.body_shape;
        }

        ShapePair() {}
        ShapePair(int p_bs, int p_ls) { body_shape=p_bs; local_shape=p_ls; }
    };
    struct RigidBody2D_RemoveAction {


        ObjectID body_id;
        ShapePair pair;

    };
    struct BodyState {

        //int rc;
        bool in_scene;
        VSet<ShapePair> shapes;
    };

    struct ContactMonitor {

        bool locked;
        Map<ObjectID,BodyState> body_map;

    };


    ContactMonitor *contact_monitor;
    void _body_enter_tree(ObjectID p_id);
    void _body_exit_tree(ObjectID p_id);


    void _body_inout(int p_status, ObjectID p_instance, int p_body_shape,int p_local_shape);
    void _direct_state_changed(Object *p_state);

    bool _test_motion(const Vector2& p_motion,float p_margin=0.08,const Ref<Physics2DTestMotionResult>& p_result=Ref<Physics2DTestMotionResult>());

protected:

    static void _bind_methods();
public:

    void set_mode(Mode p_mode);
    Mode get_mode() const;

    void set_mass(real_t p_mass);
    real_t get_mass() const;

    void set_weight(real_t p_weight);
    real_t get_weight() const;

    void set_friction(real_t p_friction);
    real_t get_friction() const;

    void set_bounce(real_t p_bounce);
    real_t get_bounce() const;

    void set_gravity_scale(real_t p_gravity_scale);
    real_t get_gravity_scale() const;

    void set_linear_damp(real_t p_linear_damp);
    real_t get_linear_damp() const;

    void set_angular_damp(real_t p_angular_damp);
    real_t get_angular_damp() const;

    void set_linear_velocity(const Vector2& p_velocity);
    Vector2 get_linear_velocity() const;

    void set_axis_velocity(const Vector2& p_axis);

    void set_angular_velocity(real_t p_velocity);
    real_t get_angular_velocity() const;

    void set_use_custom_integrator(bool p_enable);
    bool is_using_custom_integrator();

    void set_sleeping(bool p_sleeping);
    bool is_sleeping() const;

    void set_can_sleep(bool p_active);
    bool is_able_to_sleep() const;

    void set_contact_monitor(bool p_enabled);
    bool is_contact_monitor_enabled() const;

    void set_max_contacts_reported(int p_amount);
    int get_max_contacts_reported() const;

    void set_continuous_collision_detection_mode(CCDMode p_mode);
    CCDMode get_continuous_collision_detection_mode() const;

    void apply_impulse(const Vector2& p_pos, const Vector2& p_impulse);

    void set_applied_force(const Vector2& p_force);
    Vector2 get_applied_force() const;



    Array get_colliding_bodies() const; //function for script

    RigidBody2D();
    ~RigidBody2D();

};

VARIANT_ENUM_CAST(RigidBody2D::Mode);
VARIANT_ENUM_CAST(RigidBody2D::CCDMode);



class KinematicBody2D : public PhysicsBody2D {

    OBJ_TYPE(KinematicBody2D,PhysicsBody2D);

    float margin;
    bool colliding;
    Vector2 collision;
    Vector2 normal;
    Vector2 collider_vel;
    ObjectID collider;
    int collider_shape;
    Variant collider_metadata;
    Vector2 travel;

    Variant _get_collider() const;

    _FORCE_INLINE_ bool _ignores_mode(Physics2DServer::BodyMode) const;
protected:

    static void _bind_methods();
public:

    Vector2 move(const Vector2& p_motion);
    Vector2 move_to(const Vector2& p_position);

    bool test_move(const Vector2& p_motion);
    bool is_colliding() const;

    Vector2 get_travel() const;
    void revert_motion();

    Vector2 get_collision_pos() const;
    Vector2 get_collision_normal() const;
    Vector2 get_collider_velocity() const;
    ObjectID get_collider() const;
    int get_collider_shape() const;
    Variant get_collider_metadata() const;

    void set_collision_margin(float p_margin);
    float get_collision_margin() const;

    KinematicBody2D();
    ~KinematicBody2D();

};


#endif // PHYSICS_BODY_2D_H